![]() If it is filled with air, it appears as a black or opaque structure under transmitted light, or as a white structure under reflected light. The medulla is a central core of cells that may be present in the hair. Photomicrograph of Distal-Scale Pattern (Mink) Figure 89 is a diagram of imbricate scales, and Figure 90 is a photomicrograph of the distal-scale pattern in mink hairs.įigure 90. They are commonly found in human hairs and many animal hairs.
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